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| Registros recuperados: 29 | |
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| Ohsaka,Yasuhito; Nishino,Hoyoku. |
| Research has been conducted to identify sequence polymorphisms of gene promoter regions in patients and control subjects, including normal individuals, and to determine the influence of these polymorphisms on transcriptional regulation in cells that express wild-type or mutant p53. In this study we isolated genomic DNA from whole blood of healthy Japanese individuals and sequenced the promoter regions of the MDM2, p53, and p16INK4a genes. We identified polymorphisms comprising 3 nucleotide substitutions at exon 1 and intron 1 regions of the MDM2 gene and 1 nucleotide insertion at a poly(C) nucleotide position in the p53 gene. The Japanese individuals also exhibited p16INK4a polymorphisms at several positions, including position -191. Reporter gene analysis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Murine double minute 2; Polymorphism; P16INK4a; P53; Transcription. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400004 |
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| Fujitani,Kazuko; Otomo,Asako; Nagayama,Yuto; Tachibana,Taro; Kato,Rika; Kawashima,Yusuke; Kodera,Yoshio; Kato,Tomoko; Takada,Shuji; Tamura,Kei; Takamatsu,Nobuhiko; Ito,Michihiko. |
| Abstract The transcription factor DMRT1 (doublesex and mab-3 related transcription factor) has two distinct functions, somatic-cell masculinization and germ-cell development in some vertebrate species, including mouse and the African clawed frog Xenopus laevis. However, its transcriptional regulation remains unclear. We tried to identify DMRT1-interacting proteins from X. laevis testes by immunoprecipitation with an anti-DMRT1 antibody and MS/MS analysis, and selected three proteins, including PACT/PRKRA (Interferon-inducible double-stranded RNA dependent protein kinase activator A) derived from testes. Next, we examined the effects of PACT/PRKRA and/or p53 on the transcriptional activity of DMRT1. In transfected 293T cells, PACT/PRKRA and p53... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: P53; DMRT1; Germline stem cell; Testis; Xenopus. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400702 |
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| Gordón-Núñez,Manuel Antonio; Godoy,Gustavo Pina; Soares,Rosilene Calazans; Souza,Lélia Batista de; Freitas,Roseana de Almeida; Queiroz,Lélia María Guedes. |
| The aim of the study was to determine the immunohistochemical expression of the PCNA, p53 and bcl-2 proteins in pleomorphic adenomas.onineteen specimens of pleomorphic adenomas were selected for analysis by the streptavidin-biotin-peroxidase method with antibodies againstp53, PCNA and bcl-2 proteins. It was observedweak labeling for p53 in 12 cases (63.1%) andforPCNA in 8 (42.1%). With respect to the bcl-2 labeling index,ono expression of this protein was detected in 12 cases, corresponding to 63.1% of the sample. Based on these findings, it was concluded that p53 and PCNA can favor the proliferative activity of pleomorphic adenomas, whereas bcl-2 probably doesonot effectively particípate in the pathogenesis of this tumor. |
| Tipo: Journal article |
Palavras-chave: Pleomorphic adenoma; Salivary gland tumour; P53; PCNA; Bcl-2. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300010 |
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| Penna-Videau,S; Bustos-Obregón,E; Cermeño-Vivas,J. R; Chirino,D. |
| The restriction of the mechanisms of cell proliferation in murine seminiferous epithelium, in terms of induction of programmed cell death until recently has not been fully analyzed. The aim of this work was to assess the effect of Malathion (MP) on testicular morphology and function in mouse spermatogenesis. For the experiments, male albino mice of strain NMRI-IVIC, weighing between 30-40 g were used, and divided into control and experimental groups of 5 each. The animals of the experimental groups were injected with a single dose of MP: 241mg/kg weight (1/12 LD 50 ) resuspended in 0.9% saline, intraperitoneally. Animals were sacrificed at 8.3, 16.6 and 33.2 days post-injection (first, second and third spermatogenic cycles). Testicular samples were... |
| Tipo: Journal article |
Palavras-chave: Malathion; Testis; Mouse; Apoptosis; Morphology; P53; Proliferation. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400023 |
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| DRAKULIC,DANIJELA; VICENTIC,JELENA MARJANOVIC; SCHWIRTLICH,MARIJA; TOSIC,JELENA; KRSTIC,ALEKSANDAR; KLAJN,ANDRIJANA; STEVANOVIC,MILENA. |
| The altered expression of the SOX2 transcription factor is associated with oncogenic or tumor suppressor functions in human cancers. This factor regulates the migration and invasion of different cancer cells. In this study we investigated the effect of constitutive SOX2 overexpression on the migration and adhesion capacity of embryonal teratocarcinoma NT2/D1 cells derived from a metastasis of a human testicular germ cell tumor. We detected that increased SOX2 expression changed the speed, mode and path of cell migration, but not the adhesion ability of NT2/D1 cells. Additionally, we demonstrated that SOX2 overexpression increased the expression of the tumor suppressor protein p53 and the HDM2 oncogene. Our results contribute to the better understanding of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adhesion; HDM2; Migration; P53; SOX2; Wound healing. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100389 |
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| Moro,J.V.; Tinucci-Costa,M.; Silveira,A.C.T.; Gerardi,D.G.; Alessi,A.C.. |
| The expression of p53 protein was evaluated in canine transmissible venereal tumor (CTVT), as following: natural occurrence (n=8); resistant to chemotherapy (n=4); and allogeneic transplanted in progression (n=8), stable (n=8), and regression (n=8)stages. The collected specimens were submitted to GM1 immunohistochemical reaction. Results showed a mean percentage of immunomarked cells around 18.6% in CTVT of natural occurrence, 23.8% in CTVT resistant to chemotherapy, 22.9% in allogeneic transplanted CTVT in both progression and stable stages, and 35.8% in transplanted CTVT in regression stage. The results suggest that there is a functional abnormality in p53 gene and its products in the studied tumors; although, it is not possible to correlate the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Immunohistochemistry; P53; Oncology; Transmissible venereal tumor. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000200011 |
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| Faleiro,M.B.R.; Cintra,L.C.; Jesuino,R.S.A.; Damasceno,A.D.; Moura,V.M.B.D.. |
| ABSTRACT Gene expression of CDKN1A, CDKN1B, and TP53, and immunostaining of p21, p27 and p53 were evaluated to verify the role of these cell cycle inhibitors in canine prostates with proliferative inflammatory atrophy-PIA and prostatic carcinoma-PC. Seventy samples, 15 normal, 30PIA and 25PC. Regarding number of p27 and p53 labeled cells, difference between normal and PIA and PC was observed, as well as between PIA and PC for p53. Immunostaining intensities of p21, p27 and p53 were different when comparing normal tissues to PIA and PC. Sixteen cDNA of canine prostatic FFPE tissue were subjected to RT-PCR and RT-qPCR, four normal, three PIA, and nine PC. CDKN1A mRNA was detected in four PC by RT-PCR, and it was overexpressed when compared to normal by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: P21; P27; P53; PIA; RT-qPCR. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100082 |
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| Croce,G.B.; Rodrigues,M.M.P.; Faleiro,M.B.R.; Moura,V.M.B.D.; Amorim,R. Laufer. |
| Confeccionou-se um microarranjo de tecido (TMA) com 146 amostras de lesões prostáticas caninas. Este continha 17,2% de hiperplasia prostática benigna (HPB), 32,4% de atrofia inflamatória proliferativa (PIA), 2,6% de prostatite, 8,6% de focos de neoplasia intraepitelial prostática (PIN), 29,1% de carcinomas e 9,3% de próstatas normais. Cortes histológicos sequenciais foram feitos e utilizados para reação de imunoistoquímica com os anticorpos primários anti-p-53, anti-NOS-2 e anti-GSTP. Avaliou-se de cada core o escore de células marcadas para cada anticorpo utilizado. Os resultados foram tabulados por grupo diagnóstico e submetidos ao teste Tuckey. Os carcinomas prostáticos do cão e a PIA apresentaram maior número de amostras (41) com mais de 75% das... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cão; Próstata; Imunoistoquímica; Óxido nítrico; GSTP-1; P53. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000600013 |
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| Oliveira,M.C.; Marroni,C.P.; Pizarro,C.B.; Pereira-Lima,J.F.; Barbosa-Coutinho,L.M.; Ferreira,N.P.. |
| Inactivating mutations of TP53, a tumor suppressor gene, are associated with abnormal cell proliferation. Although p53 expression is common in many human malignancies, p53 protein has seldom been evaluated in pituitary tumors. When detected, the percentage of p53-positive cells is low, and, in general, it is exclusive for invasive lesions. The aim of the present study was to use immunohistochemistry to determine the presence of p53 protein in pituitary adenomas from tumor samples of 163 surgeries performed in 148 patients (40% male, 60% female). In 35% of the cases the adenoma was nonfunctional, while in the others it was associated with PRL, GH and/or ACTH endocrine hypersecretion syndrome. Macroadenomas were observed in 83.2% of the cases with available... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Pituitary; Pituitary adenoma; Invasive adenoma; P53; Immunohistochemistry. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000500008 |
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| Mourão Netto,M.; Logullo,A.F.; Nonogaki,S.; Brentani,R.R.; Brentani,M.M.. |
| There are few data evaluating biological markers for men with breast cancer. The purpose of the present study was to analyze the expression of the oncogenes c-erbB-2 and c-myc and of the suppressor gene p53 by immunohistochemical techniques in archival paraffin-embedded tissue blocks of 48 male breast cancer patients, treated at the A.C. Camargo Cancer Hospital, São Paulo, SP, Brazil. The results were compared with clinicopathological prognostic features. Immunopositivity of c-erbB-2, p53 and c-myc was detected in 62.5, 16.7 and 20.8% of the cases analyzed, respectively. Estrogen and progesterone receptors were positive in 75 and 69% of the cases, respectively. Increasing staging was statistically associated with c-erbB-2 (P = 0.04) and weakly related to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: P53; C-myc; C-erbB-2; Male breast cancer. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000700008 |
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| Faria,J.R.; Yamamoto,M.; Faria,R.M.D.; Kerbauy,J.; Oliveira,J.S.R.. |
| The expression of P53, Bcl-2, Bax, Bag-1, and Mcl-1 proteins in CD5/CD20-positive B-chronic lymphocytic leukemia (B-CLL) cells from 30 typical CLL patients was evaluated before and after 48 h of incubation with 10-6 M fludarabine using multiparametric flow cytometric analysis. Protein expression was correlated with annexin V expression, Rai modified clinical staging, lymphocyte doubling time, and previous treatment. Our main goal was to determine the predictive value of these proteins in CLL cells in terms of disease evolution. Bcl-2 expression decreased from a median fluorescence index (MFI) of 331.71 ± 42.2 to 245.81 ± 52.2 (P < 0.001) after fludarabine treatment, but there was no difference between viable cells (331.57 ± 44.6 MFI) and apoptotic cells... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chronic lymphocytic leukemia; Apoptosis; Fludarabine; P53; Bcl-2; Bax; Mcl-1; Bag-1. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000300003 |
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| Da-Costa,R.C.; Vieira,I.L.; Hunger,A.; Tamura,R.E.; Strauss,B.E.. |
| The immune stimulatory and anti-neoplastic functions of type I interferon have long been applied for the treatment of melanoma. However, the systemic application of high levels of this recombinant protein is often met with toxicity. An approach that provides localized, yet transient, production of type I interferon may overcome this limitation. We propose that the use of mesenchymal stem cells (MSCs) as delivery vehicles for the production of interferon-β (IFNβ) may be beneficial when applied together with our cancer gene therapy approach. In our previous studies, we have shown that adenovirus-mediated gene therapy with IFNβ was especially effective in combination with p19Arf gene transfer, resulting in immunogenic cell death. Here we showed that MSCs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gene therapy; Immunotherapy; Stem cell therapy; Adenovirus; P53; Interferon-β. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000300601 |
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| Ribeiro-Silva,A.; Ramalho,L.N.Z.; Garcia,S.B.; Zucoloto,S.. |
| Several investigators have identified Epstein-Barr virus (EBV) particles in breast carcinomas, a fact that supports a role for EBV in mammary tumorigenesis. The possible mechanism involved in this process is not clear. The present study was carried out in an attempt to determine whether there is a relationship between latent infection with EBV and p53 and p63 expression in breast carcinomas. Immunohistochemistry developed with 3.3-diaminobenzidine tetrahydrochloride was performed in 85 formalin-fixed paraffin-embedded breast carcinomas using anti-EBV EBNA-1, anti-p63, anti-p53, anti-estrogen receptor (ER) and anti-progesterone receptor (PR) antibodies. The cases were selected to represent each of the various histologic types: intraductal carcinoma (N =... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: EBNA-1; P63; P53; Breast; Carcinoma; Tumorigenesis. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000100013 |
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| Tian,Meili; Yang,Shuang; Yan,Xinpeng. |
| Icariin has been reported to possess high anticancer activity. Colon carcinoma is one of the leading causes of cancer-related mortality worldwide. Here, the anticancer activity of icariin against HCT116 colon carcinoma cells and the possible underlying mechanism were studied. The trypan blue staining assay, wound healing assay, clonogenic assay, CCK-8 assay, and Annexin V-FITC/PI double staining method were carried out to determine the changes of HCT116 cell growth and migration. mRNA and protein expressions were determined by quantitative real-time PCR and western blot, respectively. Moreover, small interfering RNA (siRNA) plasmid was used to examine the role of p53 in icariin-induced apoptosis in HCT116 cells. Icariin significantly suppressed colon... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colon carcinoma; Icariin; Mechanism; P53; DNA damage; Caspases. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018001000605 |
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| Registros recuperados: 29 | |
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